Office (OLE) / .XLS malware analysis — malicious · 3361e4e1f5eb4ecd

MALICIOUS

Office (OLE) / .XLS

395.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-10

MD5: 5aea8a7e6627615da6ae2e209927a39d SHA-1: 5717e933260c4ef9190e36638aad2886d6c2f7db SHA-256: 3361e4e1f5eb4ecd9910661a4698b20f42e8a79c3e90fde83d542528773d08e8

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: Malicious Attachment T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This vulnerability is commonly used to deliver secondary payloads. Although the VBA macros themselves appear empty of executable statements, the presence of the Equation Editor exploit object strongly suggests an attempt to compromise the user's system.

Heuristics 3

Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE

An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`ole10native_00.bin` `3d1b0ab7b709606d6c0c9307ae79425c0ad0270c577b90f90c365c12d7698fca`	ole-package	OLE Ole10Native stream: MBD01FCFAAD/oLE10native	1540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.